Studies on the effect of ethanol on the Na+, and the Na+,K+ATPase activities of plasma membranes of rat kidney proximal tubular cells
Acta cient. venez
;
45(4): 281-6, 1994. tab, graf
Article
in English
| LILACS
| ID: lil-216740
ABSTRACT
In the present work it was investigated the effect of 2 percent ethanol on the Na+ and on the Na+, K(+)-ATPase activities. The differential effect of the alcohol on the two ATPases (approximately 40 percent inhibition of the Na(+)-ATPase and approximately 10 percent inhibition of the Na+, K(+)-ATPase), is not due to a higher degree of denaturalization of the enzyme, nor to a faster effect of ethanol on the Na(+)-than on the Na+, K(+)-ATPase. Our results show that ethanol affects the selectivity of the Na+, K(+)-ATPase for Na+ and/or for K+, enhancing the Na+ affinity for the K+ sites, and/or reducing the K+ affinity for its own sites. This effect was not seen for the Na(+)-ATPase, indicating that 2 percent ethanol inhibits the two ATPases in a totally different way
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Index:
LILACS (Americas)
Main subject:
Sodium
/
Cell Membrane
/
Sodium-Potassium-Exchanging ATPase
/
Ethanol
/
Kidney Tubules, Proximal
Limits:
Animals
Language:
English
Journal:
Acta cient. venez
Journal subject:
Science
Year:
1994
Type:
Article
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